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Are you talking about music specifically? Playing an instrument? Composing? Performing arts encompasses a lot of different areas, like dance, acting, singing ( this might go under music ). There are lots of places on the internet to showcase your talents. When I was your age, the only thing to do was take head shots, and browse the papers, of course you had to live in either LA or NY. Of course you need to practice, practice, practice! Audition, audition, audition! Try youtube and the like. Great ways to get yourself noticed. Help this helps, not someone who is in the field, just some experience a very long time ago.